css/css-transforms/add-child-in-empty-layer.html

<!DOCTYPE html>
<html class="reftest-wait">
<title>Adding a child to an empty layer</title>
<link rel="help" href="https://www.w3.org/TR/css-transforms-2/">
<link rel="match" href="add-child-in-empty-layer-ref.html">
<style>
.empty-layer {
  transform: rotateY(30deg) rotateX(-30deg);
  width: 100px;
  height: 100px;
}
.inserted {
  width: 50px;
  height: 50px;
  background-color: red;
}
</style>
<!--
  Force to create composited layer with empty then inserts a child the layer.
-->
<div id="empty-layer" class="empty-layer"></div>
<script>
requestAnimationFrame(() => {
  requestAnimationFrame(() => {
    var div = document.getElementById("empty-layer");
    div.innerHTML = '<div id="inserted" class="inserted"></div>';
    requestAnimationFrame(() => {
      document.documentElement.removeAttribute('class');
    });
  });
});
</script>